TOOGOO(R) 5 Pcs Clip On Noise Suppressor 3.5mm Cable Ferrite Core Filters Product Name : Ferrite Core Filter Type : Ferrite Core Noise Suppressor External Size(Approx) : 25 x 13 x 11mm / 0.98" x 0.5" x 0.43"(L*W*T) Fit Cable Diameter : 3.5mm / 0.14" Material : Plastic(Housing), Ferrite ( Core)